regulates DNA-templated transcription elongation regulation of DNA-templated transcription regulation of DNA-templated transcription elongation regulation of transcriptional elongation biological_process GO:0032784 transcription elongation regulator activity regulation of DNA-templated transcription, elongation regulation of RNA elongation regulation of DNA-dependent transcription, elongation Any process that modulates the frequency, rate or extent of transcription elongation, the extension of an RNA molecule after transcription initiation and promoter clearance by the addition of ribonucleotides catalyzed by a DNA-dependent RNA polymerase. regulation of transcription elongation, DNA-dependent